Abstract
The photocatalytic degradation of telmisartan (TN), an anti-hypertensive drug was studied in aqueous media using different catalysts (Fenton, photo-Fenton and Titania (TiO2)) and different atmospheric conditions (air, oxygen (O2), air/hydrogen peroxide (air/H2O2), Oxygen/hydrogen peroxide O2/H2O2). In addition, the degradation experiments were also carried out using telmisartan based commercial tablets. The concentration of telmisartan during the degradation process was monitored by UV–Vis spectrophotometer. It has been found that O2/H2O2 atmospheric condition and into the presence of TiO2 shows higher degradation rate. The degradation was followed by pseudo-first order kinetics. The effect of various operating parameters such as concentration of telmisartan, dosage of the catalyst, pH and nature of irradiation was systematically studied. The mineralization trend of telmisartan was followed by TOC (total organic carbon) content and it was observed that complete mineralization could be achieved within a period of 3 h. The telmisartan metabolites or by-products during the degradation were analyzed and identified by GC–MS technique.
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Acknowledgements
The corresponding author (K.N) of this paper wishes to express his gratefulness to Science & Engineering Research Board (SERB), Department of Science and Technology (DST), Government of India for providing the financial support (EMR/2016/006812 Dated: 02-Nov-2017).
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Raji, A., Pandiyaraj, K.N., Kandavelu, V. et al. Efficiency evaluation of the photocatalytic degradation of telmisartan anti-hypertensive drug with Fenton, photo-Fenton and recyclable TiO2 heterogeneous catalyst. Reac Kinet Mech Cat 130, 1141–1154 (2020). https://doi.org/10.1007/s11144-020-01806-8
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DOI: https://doi.org/10.1007/s11144-020-01806-8